HP-65 more on the card reader

[albertofenini]

Here we are :
Looking at the picture, the two keyboards can be seen :

UPPER (Faulty) model 00065-60201 rev 51 803F D 61
LOWER (Spare without anode and cathode drivers) model 000605-60201 rev 3351 B-1341-61

The lower is much similar to the one we have in the working calculators,
however, the upper has been really carefully examined and appears to be perfect

   

Any idea ?

Thanks again !!!